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Phenotypes Associated with This Genotype
Genotype
MGI:7545527
Allelic
Composition
Rac1tm1Djk/Rac1tm1Djk
Gt(ROSA)26Sortm4(ACTB-tdTomato,-EGFP)Luo/Gt(ROSA)26Sor+
Tg(Mef2c-cre)2Blk/0
Genetic
Background
involves: 129 * BALB/c * C57BL/6 * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(ACTB-tdTomato,-EGFP)Luo mutation (10 available); any Gt(ROSA)26Sor mutation (1062 available)
Rac1tm1Djk mutation (1 available); any Rac1 mutation (26 available)
Tg(Mef2c-cre)2Blk mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cardiovascular system
• at E11.5, hearts show deficient second heart field (SHF) contribution to the developing muscular interventricular septum between the right (RV) and left ventricle (LV)
• at E12.5 and E15.5, the interventricular septum has a major deficiency of SHF-derived cells, leading to formation of a bifid cardiac apex

cellular
• E12.5 right ventricle (RV) explant cultures exhibit only non-SHF-derived (mT-labeled) cells migrating from the RV explant by day 6 and very few to no SHF-derived (mG-labeled) cell migration


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
01/06/2026
MGI 6.24
The Jackson Laboratory